Looper exhaust porting

[Captain75]

Yup, looks good! What did you use to enlarge the holes? I used a reamer and cleaned it up with a dremel. Mine turned out nice.

[Captain75]

When doing all the preparations for reassembly, I try to study all parts really critical iot find any areas in need of attention. I might have raised this question before but anyway: Do I have anything to gain by aiming the edges shown in the pic towards the rodslot? I hope to build a torque monster, rather than a high revving screamer... My goal has been peak power at appx 6200-6300.

(The edges I refer to are pointed out by the wooden sticks)

[FORBESAUTO]

I think it's more important to have all the angles in floor, lower sleeve, and piston in a manner to promote for as straight of a shot behind sleeve as possible. You have a narrow path behind the sleeve, the more you can straighten out the path upward without any turbulence and dead spots from bouncing off the walls, the velocity is increased that much more. Velocity is king, especially in what you're after. JMO.

[Captain75]

Hello again!
Another thing I need to do before reassembly is filling the idle reliefs.
Is the regular JB Weld ok for this with respect to the heat?

Or do I need the one below?

[faztbullet]

I tap and plug em with s/s socket screw then take a punch and roll a lip in the aluminumso it cant back out.

[powerabout]

jb weld works fine

[olboatman]

Why wouldn't you use the "Extreme Heat" JB ? Just askin.
Gary

[Captain75]

Why wouldn't you use the "Extreme Heat" JB ? Just askin.
Gary

Its simple, I have the regular stuff in my shop, the extreme version needs to be ordered.
The regular version must work when adding the dams in the 2.7 heads aswell, or is it too fluid?

[olboatman]

Its simple, I have the regular stuff in my shop, the extreme version needs to be ordered.
The regular version must work when adding the dams in the 2.7 heads aswell, or is it too fluid?

Capt I just used some regular JB this weekend and it was the same consistency as peanut butter if that helps also I read the warmer the less viscosity it has.

Gary

[Captain75]

When inspecting the cyls I realized some has got a slight red tone...
I washed the block with very hot water/steam and despite I oiled the bores just seconds after, some rust was created.
What do you guys think, does it matter? Seems like it should dispear after a few piston strokes!?
Or should I give the bores a couple of strokes with the Lisle 280grit and wash it with diesel instead of soap and hot water?
Btw, thanks oldboatman!!

[Captain75]

When inspecting the cyls I realized some has got a slight red tone...
I washed the block with very hot water/steam and despite I oiled the bores just seconds after, some rust was created.
What do you guys think, does it matter? Seems like it should dispear after a few piston strokes!?
Or should I give the bores a couple of strokes with the Lisle 280grit and wash it with diesel instead of soap and hot water?
Btw, thanks oldboatman!!

[gfinch]

https://www.amazon.com/Murphy-Oil-So...il%2Bsoap&th=1
This leaves a slight oily film. That discoloration will disapear with a couple strokes of the piston rings.

[Captain75]

https://www.amazon.com/Murphy-Oil-So...il%2Bsoap&th=1
This leaves a slight oily film. That discoloration will disapear with a couple strokes of the piston rings.

Thanks gfinch! Guess I will leave it then!
Btw, does anyone have a picture showing added epoxi dams to a 2.7 head?

[powerabout]

Thanks gfinch! Guess I will leave it then!
Btw, does anyone have a picture showing added epoxi dams to a 2.7 head?

what are they?

[Captain75]

what are they?

The barrier you are supposed to add between the combustion chambers IOT prevent cooling water to pass. Supposed to be done when running open deck heads on a closed block.